Mars Attacks!- Sure, cheesy jokes and predictable story, but I think it works as an effective satire of the "Alien Invasion" genre. It has a great ensemble cast with Jack Nicholson at the top of his game.
Transformers- Flat lines, another excuse for Shia Lebouf to yell "NO NO NO NO NO NO", and another Michael Bay shit fest BUT!!!! Giant, fighting robots. How can you go wrong?
Batman Forever- Great performances all around and the visual style make up for the bat nipples and "I'll take drive thru" moments. Too bad it paved the way for the shitfest that must not be named.